geanms



UNITED rSTATES PATENT OFFICE.

HIAL s. eRANNIs, oF soUTHiNGToN, CONNECTICUT, AssieNoR To THE PECK,s'row a wILCox COMPANY, CE SAME PLACE.

STOVE-PIPE FRM ER.

SPECIFICATION forming part of Letters Patent o. 402,582, dated May '7,18`89.

Application filed February 6, 1889,. Serial No. 298,393. (No model.) f

To @ZZ whom it may con/cern:

Be it known that I, HIAL S. GRANNIS, a citizen of the United States,residing at Southington, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inStove-Pipe Formers, of which the followingV is a specification.

My invention relates to improvements in stove-pipe formers; and theprincipal object of my invention is to provide convenient and efficientmeansfor releasing and tipping the roller around which the pipe isformed, so that the pipe may be slipped endwise off the roller, therebymaking what is called a slip-roll former.

'In the accompanying drawings, Figure 1 is a front elevation of myformer with the middle portion broken away. Fig. 2 is a side elevationof the right-hand end. Fig. 3 is a side elevation of the left-h and endwith the hinged box thrown backward and the upper roller tilted. Fig. 4is a perspective view of the upper end of the frame for the right-handend of the former. Fig. 5 is a vertical section on line Fig. 3, of theright hand end of said former, some of the parts being shown inelevation. Fig. 6 is aside elevation showing the outer side of the boxfor the upper roller at the righthand end of the machine; and Fig. 7 isaV transverse section, on line y y of Fig. 3, of the hinged box for theupper roller. at the left-handend of the machine.

A designates the frame for the right-hand end of the machine, and B theframe for the left-hand end of the machine.

C designates the upper roller, and DVD the lower rollers, while EVdesignates the tie-rod which holds the two end frames in place. The twolower rollers, D D, are adjusted to and from the upper roller by meansof the adjustf ing-screws 8, which bear against the under side of thesliding boxes 9, in which said rollers take their bearings. i

At the left-hand end of the machine the upper roller takes its bearingin the recess 10, Fig. '7, of the hinged box 11, said bearingrecessbeing indicated by broken lines in Fig. 3. i This hinged box is hungupon the frame B by any suitable hinge, as at 12,Fig. 3,while its outerend is slotted and provided with a pivotal'link or strap, 137 to theother end of which link is pivoted the cam-lever 14. At the front partof the frame B is a projecting lug, 15, which is slotted vertically toreceive the body of the link 13. When the hinged box 11 is brought downover the journal at that end of the upper roller, C, and the calnleveris held in substantially a horizontal position, the lower end of thelink 13 may be slipped into the slot in the slotted lug 15, after whichby depressing said cam-lever -into a vertical position, as shown in Fig.2, the hinged box is firmly drawn down and secured in place. Byreversing the operation the hinged box is released again and may beturned backward on its hinge, as shown in Fig. 3, thereby lreleasingthat end of the upper roller.

While I prefer to slot the lug 15 so that the link or strap 13 shall bereceived in the slo thereof and the cams upon both sides of said strapbear upon said lug, this is not essential, as the parts would operatethe same if all that portion of the lug on one side of its slot wereremoved, in which case the cam 14 would be held by a lug at one sideonly of the link 13.

At the right-hand end of the machine one of the lower rollers, I), isprovided with an ordinary driving-crank, F, and a pinion, G, whichmeshes into a like pinion, H, 011 the upper roller, C. The right-handend of said roller is provided with a shaft-like projection, 16, inwhich is formed a peripheral groove, 17. The frame A is provided withahorn or rigid projection, 18,-which extends over the shaftlike projeotion 16 of the upper roller, and its inner face is formed with'a bead,19, fitted to the groove 17, which bead forms the fulerum or centralpoint upon which the upper roller, C, may be tilted. vThe upper roller,C, at this end of the machine has its bearing in the box 20, which boxis provided with side ledges, 21, for bearing upon the xed ledges 22 ofthe frame A at the respective sides of the recess that receives saidbox. These ledges 22 project slightly from the inner face of the frame Aand are curved toward their upper end on the arc of a circle whosecenter is the bead or fulcruin 19, on which the roller C is tilted. Theconfronting faces of the ledges 21 are formed on a corresponding curve,as shown in Fig. 1. The box 2O is lifted and let down by IOO means ofthe lifting-screw 28, upon the squared upper end of which screw isplaceda wrench, 2l, for convenience of turning said screw. This screw isconnected with the box in such manner as to allow freedom of the box torock or tilt thereon. I have illustrated the screw as connected with thebox by means of a knob, 25, at its lower end, which knob takes into atransverse recess, 26,having overhanging shoulders in the boxes. (SeeFigs. 5 and (i.) This particular connection of the box and lifting-screwis made the subject of a separate application, Serial No. 298,895, ofeven date herewith.

It is only essential to my present invention that the lifting-screw 23and box 20 be connected by some means that will permit of the rockingmotion of said box. I also provide the upper end of the frame A with twolugs, 27, to limit the movement of the wrench 24 to half a turn. Theselugs are not essential, but are a matter of convenience, as they areintended to limit the movement of the wrench to that half-circle whichis outside ot" the frame, and consequently the wrench will not bebrought over the body of the rollers, so as to be in the way of the workbeing formed thereon. A half-revolution of the lifting-screw is amplefor the purposes of my invention.

The lifting-screw 23 and the box 2O are so adj usted that when the'wrench 24 is carried around against the rear one of the lugs 27 thatend of the rollerwill be in proper position for use and will coincidesubstantially with the opposite end of the roller as held in place bythe hinged box 11. Said box 11 and the rigid horn 18 render the upperroller, C, non-adj ustable by fixing the height for the working p0-sition of said roller. Vhen in this position, the lower rollers will beadj usted to the upper roller for the work desired. Aftera pipe has beenformed on said rollers the hinged box is turned backward on its hingeand the wrenchhandle brought around toward the front to litt the box 20,thereby lifting also the roller C, causing it to tilt orswing uponitsfulcrumbead 19, so as to elevate the left-hand end, as shown in Figs. 3and 5, suiiiciently to enable the pipe to be slipped oit from said upperroller. The wrench 2l is then turned back again to its rearmost positionand the hinged box again secured over the left-hand end of the upperroller, and the machine is ready for forming another pipe.

The class of slip-rollerformers to which my invention relates is an oldone, and one prior patent in this class shows a box for one end of theupper roller as made of two parts adjustable to and from each other andsecured for being adjusted vertically together in a hinged yoke thatswings on an axis extending transversely to said upper roller, while theopposite end of said upper roller is mounted in a hinged bearingadjustable vertically in the frame by an adj listing-screw, said hingedbearing forming the axis of said upper roller for tilting it. Said upperroller is also extended beyond its hinged bearing in a shaftlikeprojection to a third verti cal ly-ad j ustable bearing for the purposeof preventing thc opposite end of the roller from falling when thebearing in the hinged yoke is removed therefrom. The two lower rollersinsaid machine are non-adj ustable. All of said prior art is herebydisclaimed.

I claim as my invention- 1. The combination of the non-adjustable upperroller, C, hinged box 11, for holding and releasing one end of saidroller, mechanism for tilting said roller, and two under rollersprovided with adjusting-screws 8, for adjusting said under rollersrelatively to the upper tilting roller, substantially as described, andfor the purpose specified.

2. The combination, in a former, of the hinged box 11, the upper roller,C, provided with a shaft-like projection having a peripheral groove, 17,the rigid horn 18 upon the frame, provided with a fulcrum-bead for saidshaft-like projection, the box 20, and liftingscrew 23, for lifting saidroller and swinging it on its fulcrum at the end of the rigid horn 18,substantially as described, and for the purpose specified.

3. In aformerhavingan upper tilting roller, the combination of the frameB, provided with the lug 15, the hinged box 11, for holding one end ofsaid upper roller, the link 13, hinged to the outer end of said box, andthe cam-lever 14, substantially as described, and for the purposespecified.

4. In a former having an upper tilting roller provided ywith ashaft-like projection having the peripheral groove 17, the frame B,having the horn 18 and fulcrum-bead 19, fitted to said groove 17, theprojecting ledges 22, also formed on said frame, and the box andlifting-screw connected thereto, said box 2O being provided with sideledges, the faces of which, together with the faces of the ledges 22,are on the arc of a circle of which the fulcrum-bead 19 is the center,substantially as described, and for the purpose specified.

IIIAL S. GRANNIS.

IVitnesses:

ELBERT O. MOORE, AUGUsTINE M. LEWIS.

IOC

IIO

